it did work, I ended up beating her several days ago and never thought about it again. She does this when you stand too close to the guards when she jumps in the air. She'll trigger an animation where she flies to your right or left to try and flank you, if you're too close to her guards when she comes down on your side she'll be outside of the guards and it'll freeze the boss fight.
Try to reload the checkpoint, that's what fixed it for me.
it did work, I ended up beating her several days ago and never thought about it again. She does this when you stand too close to the guards when she jumps in the air. She'll trigger an animation where she flies to your right or left to try and flank you, if you're too close to her guards when she comes down on your side she'll be outside of the guards and it'll freeze the boss fight.